WO2013159597A1

WO2013159597A1 - Data transmission method, user equipment, and base station

Info

Publication number: WO2013159597A1
Application number: PCT/CN2013/072121
Authority: WO
Inventors: 张兴炜
Original assignee: 华为技术有限公司
Priority date: 2012-04-26
Filing date: 2013-03-04
Publication date: 2013-10-31
Also published as: CN103378932A; CN103378932B

Abstract

A data transmission method, a user equipment, and a base station. The method comprises: sending an initial transmission scheduling permission command to a user equipment, to instruct the user equipment to send, in multiple sub-frames, the same data and scheduling parameters indicating the same data; and dividing the multiple sub-frames into M non-consecutive groups, namely, Group 1 to Group M, M≥2, each group comprising one sub-frame or multiple consecutive sub-frames (S11); and receiving the same data sent by the user equipment in the multiple sub-frames, and feeding back to the user equipment a response message indicating whether the same data is accurately received, the same data sent by the user equipment in one sub-frame or multiple consecutive sub-frames in each group being corresponding to each set of data (S12). Embodiments of the present invention can enhance uplink coverage in communication.

Description

Data transmission method, user equipment and base station

The present application claims priority to Chinese Patent Application No. 201210126737.9, entitled "Data Transmission Method, User Equipment and Base Station", filed on April 26, 2012, the entire contents of in. Technical field

The present invention relates to communications technologies, and in particular relates to a data transmission method, user equipment and a base station Background _t

3GPP (3rd Generation Partnership Project) LTE (Long

In Term Evolution, long-term evolution, the basic unit of physical layer scheduling is subframe (1ms), so that a small time interval can make the application time delay in LTE smaller. However, in the case where the coverage is limited, the UE (User Equipment) may not be able to satisfy the BLER (Block Error Rate) of data transmission within 1 ms interval due to its own transmission power limitation. , block error rate) requirements. Therefore, the concept of Transmission (Transmission Time Interval) Bundling is proposed in LTE. The principle is to bind multiple consecutive uplink TTIs to the same UE and send pairs in these uplink TTIs. A plurality of Redundancy Versions (RVs) formed by encoding the same information bits, thereby increasing the probability of successful data decoding and improving the uplink coverage of LTE, at the cost of adding some time delay. The eNodeB (Evolved Node B) only feeds back the HARQ (Hybrid Automatic Repeat reQuest) ACK/NACK (positive/negative acknowledgement) after receiving all the bound uplink frames. In this way, the number of ACK/NACKs of the required HARQ can be reduced. At the same time, the uplink resource is allocated once and applied to all the bound uplink frames, so that the overhead of uplink resource allocation is also reduced. In LTE Rel-8 (version 8), the number of consecutively transmitted TTIs (TTI Bundle_Size) in TTI Bundling is defined as 4. As shown in FIG. 1 , if the eNodeB sends a UL grant (uplink scheduling permission command) to the UE in subframe n, the UE transmits the same transmission coding block in 4 consecutive uplink subframes of n + 4 to n + 7 respectively. The different redundancy versions RV0, RV1, RV2, RV3, and 4 uplink subframes are bound together and transmitted through HARQ Process 0 (that is, the HARQ process with process number 0). The eNodeB has a processing time of 4 ms (including the transmission delay). In the n + 11 subframe, the eNodeB feeds back an ACK or a NACK to the UE through a PHICH (Physical Hybrid ARQ Indicator Channel). 4 In this example, the eNodeB feedback NACK, then the TTI Bundling corresponding to the HARQ Process 0 will be retransmitted from the subframe n+20. The time interval for TTI Bundling retransmission in LTE is 16 TTIs, that is, 16 1 ms subframes.

If the UE receives the UL grant at the subframe n+16, indicating the uplink scheduling parameter, the uplink HARQ retransmission of the TTI Bundling is adaptive, and the indicated parameter is used for transmission on the indicated resource band, otherwise it is non- Adaptive, using the same uplink resources and the same parameters for the initial transmission.

The UL grant includes DCI (Downlink Control Information) format 0 and DCI format 4, and is carried in a PDCCH (Physical Downlink Control Channel). When the NDI (New Data Indication) field is 1, the UL grant is an initial transmission scheduling permission command, and when the NDI field is 0, the UL grant is a retransmission scheduling permission command. For example, the field composition of DCI format 0 is as shown in Table 1, including various scheduling parameters:

3⁄41 DCI format 0 field

Information field

Carrier Indicator Field (CIF) 3 (only available in USS)

DCI format 0 and 1A format distinguishing identifier 1

Frequency domain frequency hopping indicator (FH flag) 1 Resource Allocation (RA) [log ₂ (N^ (N^ + l) / 2)] (Note 1)

Modulation coding mode and redundancy version (MCS, RV) 5

New Data Indication (NDI) 1

Power Control Command (TPC) 2

Demodulation reference signal DM RS cyclic shift (CS) 3

Upstream indication (UL index for TDD systems) 2

Downlink Assignment Indication (DAI) 2

Channel Quality Indication Request (CQI request) l(CSS), 2(USS)

Listening to the signal indication request (SRS request) 0 or 1

Resource allocation type indication (RA type) 1

Redundant bits (Note 2) m (specifically configured according to uplink and downlink bandwidth) Cyclic Redundancy Check (CRC, Cyclic)

Redundancy Check 16 Note 1: "*] means round up, and N means UL system bandwidth, specifically the number of resource blocks (RBs) included.

Note 2: Sometimes the CRC is also excluded, and the field before the CRC is called DCI format.

0. Currently, the uplink coverage can be enhanced by modifying the TTI Bundle-Size. As shown in Figure 2, the original 4 uplink subframes are bound together and extended to 8 uplink subframes for transmission. At the same time, the retransmission interval is kept unchanged for 16 subframes. Although the existing method of extending the TTI Bundle-Size can enhance the uplink coverage to a certain extent, in some scenarios with limited coverage, the uplink coverage is still insufficient and needs to be further enhanced. Summary of the invention

The embodiment of the invention provides a data transmission method, a user equipment and a base station, which can enhance uplink coverage in communication.

The embodiment of the invention provides a data transmission method, including:

Sending an initial transmission permission permission command to the user equipment, instructing the user equipment to send in multiple subframes The same data and scheduling parameters indicating the same data; the plurality of subframes are divided into M non-contiguous groups, which are in order from the first group to the Mth group, M > 2, and each group includes one subframe or Multiple consecutive subframes;

Receiving the same data sent by the user equipment in the multiple subframes, and feeding back to the user equipment whether the response message of the same data is correctly received, where the user equipment is in one subframe or multiple consecutive subframes of each group The same data sent in is corresponding to each set of data.

An embodiment of the present invention further provides another data transmission method, including:

Receiving an initial transmission scheduling permission command of the base station; the initial transmission scheduling permission command is used to indicate that the user equipment sends the same data in multiple subframes and the scheduling parameter indicating the same data; the multiple subframes are divided into M discontinuous a group, in order from the first group to the M group, M > 2, wherein each group includes one subframe or a plurality of consecutive subframes;

Transmitting the same data in the multiple subframes, and receiving a response message fed back by the base station to correctly receive the same data, where the user equipment sends the same data in one subframe or multiple consecutive subframes of each group Corresponds to each set of data.

An embodiment of the present invention provides a base station, including:

An initial transmission scheduling sending module, configured to send an initial transmission scheduling permission command to the user equipment, instructing the user equipment to send the same data in multiple subframes and a scheduling parameter indicating the same data; the multiple subframes are divided into M a non-contiguous group, which is a first group to an Mth group, respectively, M > 2, and each of the groups includes one subframe or a plurality of consecutive subframes;

a data processing module, configured to receive the same data sent by the user equipment in the multiple subframes, and feed back, to the user equipment, a response message that correctly receives the same data, where the user equipment is in one subframe of each group The same data transmitted in one or more consecutive subframes corresponds to each set of data. An embodiment of the present invention provides a user equipment, including:

An initial transmission scheduling receiving module, configured to receive an initial transmission scheduling permission command of the base station, where the initial transmission scheduling permission command is used to indicate that the user equipment sends the same data in multiple subframes and the scheduling parameter indicating the same data; The sub-frames are divided into M non-contiguous groups, which are in order from the first group to the M-th group, M > 2, and each of the groups includes one subframe or a plurality of consecutive subframes;

a data transceiver module, configured to send the same data in the multiple subframes, and receive a response message that is correctly received by the base station to receive the same data, where the user equipment is in one subframe or multiple consecutive subframes of each group The same data sent in is corresponding to each set of data.

The data transmission method, the user equipment, and the base station provided by the embodiments of the present invention have the following beneficial effects: dividing a plurality of subframes that perform TTI bundling into at least two non-contiguous groups, and the user equipment sends the same in multiple subframes of the group. Different redundancy versions of the data can avoid deep fading on successive subframes and fail to reach the channel quality target, and at the same time obtain a certain time diversity gain, which can enhance the uplink coverage in communication. DRAWINGS

1 is a timing relationship diagram of ΤΉ bundling data transmission in the prior art;

2 is another timing relationship diagram of TTI bundling data transmission in the prior art;

3 is a schematic flow chart of an embodiment of a data transmission method provided by the present invention;

4 is a schematic flow chart of another embodiment of a data transmission method provided by the present invention; FIG. 5 is a timing relationship diagram of a data transmission method provided by the present invention;

6 is another timing relationship diagram of a data transmission method provided by the present invention;

7 is still another timing relationship diagram of the data transmission method provided by the present invention; 8 is a schematic structural diagram of an embodiment of a base station provided by the present invention;

9 is a schematic structural diagram of an embodiment of a data processing module of a base station according to the present invention; FIG. 10 is a schematic structural diagram of an embodiment of a user equipment provided by the present invention;

11 is a schematic structural diagram of an embodiment of a data transceiver module of a user equipment provided by the present invention.

detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

Referring to FIG. 3, it is a schematic flowchart of an embodiment of a data transmission method provided by the present invention. The data transmission method provided in this embodiment includes the following steps:

511. Send an initial transmission permission permission command to the user equipment, where the user equipment is instructed to send the same data in multiple subframes and a scheduling parameter indicating the same data. The multiple subframes are divided into M non-contiguous groups. For the first group to the Mth group, M>2, the each group includes one subframe or multiple consecutive subframes; the subframes in each group are subframes for performing TTI bundling;

512. Receive the same data sent by the user equipment in the multiple subframes, and feed back, to the user equipment, a response message that correctly receives the same data, where the user equipment is in one subframe or multiple consecutive groups of each group. The same data transmitted in the subframe corresponds to each set of data.

Wherein the first group includes consecutive sub-frames, the second group comprising K ₂ consecutive sub-frames, ..., the first K0 _[mu] [mu] group comprises consecutive subframes. The total number of subframes in the M non-contiguous groups is greater than four. That is 4.

Each group of data corresponds to each hybrid automatic request retransmission process number (HARQ process number for short); each hybrid automatic request retransmission process number is used to identify scheduling and feedback during data initial transmission or retransmission. Is each of the sets of data.

Optionally, in the multiple subframes, a redundancy version of the same data sent on every two adjacent subframes is different. If the number of subframes in the Xth group is K _x >4, the redundancy version used in the previous subframe can be reused or the existing 4 redundancy versions (ie, RV0, RV1, RV2, RV3) can be extended to More, of which, 1 XM.

Specifically, the foregoing step S11 includes:

Sending a first transmission scheduling permission command to the user equipment, indicating scheduling parameters of the same data sent by the user equipment in multiple subframes of the M non-contiguous groups; or

Sending M initial transmission scheduling permission commands to the user equipment; each initial transmission scheduling permission command corresponds to one subframe or a plurality of consecutive subframes of the group, and is used to indicate that the user equipment is in one subframe of the group Or each set of scheduling parameters of the same data sent in multiple consecutive subframes.

Specifically, the foregoing step S12 includes:

Receiving, by the user equipment, the Xth group of data sent in one subframe or multiple consecutive subframes of the Xth group;

If the data sent by the user equipment in any subframe of the Xth group is correctly received, the user equipment is fed back an acknowledgement message that correctly receives the Xth group of data; if the user equipment is not correctly received in the Xth group The data sent by all of the one or more consecutive subframes feeds back to the user equipment a negative acknowledgement message that does not correctly receive the Xth group of data; wherein, 1 XM.

Specifically, when the user equipment is fed back to the user equipment, whether the response message of the Xth group data is correctly received Between, is the kth subframe after the last subframe in the Xth group; where k > 4.

Preferably, for FDD (Frequency Division Duplexing) mode, k=4; for TDD (Time Division Duplexing) mode, k=4, 5, 6, or 7.

In an embodiment, the data transmission method provided in this embodiment further includes: receiving, when the Xth data retransmission time comes, receiving the Xth group of data retransmitted by the user equipment.

The retransmission time of the Xth group of data is the mth subframe after the first subframe in the Xth group; where m>8.

In addition, optionally, the data transmission method provided in this embodiment, before the retransmission time of the Xth group of data arrives, further includes: sending a retransmission scheduling permission command to the user equipment, indicating retransmission of the Xth group of data The scheduling parameters are updated, ie adaptive retransmission. Referring to FIG. 4, it is a schematic flowchart of another embodiment of a data transmission method provided by the present invention. The data transmission method provided in this embodiment includes the following steps:

521. Receive an initial transmission permission permission command of the base station, where the initial transmission permission permission command is used to instruct the user equipment to send the same data in multiple subframes and a scheduling parameter indicating the same data; the multiple subframes are divided into M a non-contiguous group, which is a first group to an Mth group, respectively, M > 2, and each of the groups includes one subframe or a plurality of consecutive subframes;

522. Send the same data in the multiple subframes, and receive a response message that is correctly received by the base station to receive the same data, where the user equipment sends the same in one subframe or multiple consecutive subframes of each group. The data corresponds to each set of data.

Specifically, the foregoing step S21 includes:

Receiving a first transmission scheduling permission command of the base station; the initial transmission scheduling permission command instructing the user equipment to send the same data in multiple subframes of the M non-contiguous groups; or

Receiving M initial transmission scheduling permission commands of the base station; each initial transmission scheduling permission command corresponds to a set of subframes, and is used to indicate that the user equipment sends the same data in multiple subframes of a group.

Specifically, the foregoing step S22 includes:

Transmitting the Yth group of data in one subframe or a plurality of consecutive subframes of the Yth group;

Receiving, by the base station, a response message of whether the Group Y data is correctly received;

If the acknowledgement message correctly received by the base station and receiving the Yth group data is received, the data is not sent in one subframe or multiple consecutive subframes of the remaining group;

If the negative response message that is not correctly received by the base station and does not correctly receive the Yth group data is received, then the Y+1 group data is continuously sent in one subframe or multiple consecutive subframes of the Y+1 group; wherein, 1 Y < Μ-1 ₀

In the specific implementation, it is assumed that Μ=5, after the user equipment sends the data of the first group of subframes, Receiving the acknowledgement message correctly received by the base station to receive the first group of data, the user equipment no longer transmits the data of the second group to the fifth group of subframes; otherwise, continues to send the same data in the second group of subframes. . Similarly, after receiving the data of the second group of subframes, the user equipment receives the acknowledgement message correctly received by the base station and receives the second group of data, and the user equipment does not send the third group to the fifth group. Frame data; otherwise, continue to send the same data in the third group of subframes. And so on, until the fifth set of data is sent.

Specifically, the time when the base station feeds back the response message of the Xth group of data correctly is the kth subframe after the last subframe in the Xth group; where, 1 X M, k > 4. Moreover, as long as the base station correctly receives the data of any of the subframes in the Xth group, it feeds back the positive response message that correctly receives the Xth group of data; otherwise, the feedback does not correctly receive the negative response message of the Xth group of data.

In an embodiment, the data transmission method provided in this embodiment further includes: if, before the arrival of the Xth group data retransmission time, receiving an acknowledgement message fed back by the base station to correctly receive any set of data, Retransmit the Xth group of data;

If the acknowledgement message correctly received by any one of the sets of data fed back by the base station is not received before the X-th data retransmission time arrives, the X-th group data is retransmitted when the X-th data retransmission time arrives; Among them, 1 XM.

Further, in the process of retransmitting the Xth group of data, if the acknowledgement message that correctly receives any set of data fed back by the base station is received, the retransmission of the Xth group of data is stopped; if the base station does not receive the feedback The correct answer message of any set of data is received, and the X-th data is continuously retransmitted.

The retransmission time of the Xth group of data is the mth after the first subframe in the Xth group. Subframe; where m > 8.

In addition, optionally, the data transmission method provided in this embodiment, before the retransmission time of the Xth group of data arrives, further includes: receiving a retransmission scheduling permission command of the base station; A scheduling parameter update indicating retransmission of the X-th data, that is, adaptive retransmission. The data transmission method provided by the present invention will be described in detail below with reference to FIG. 5 to FIG.

Referring to FIG. 5, it is a timing relationship diagram of the data transmission method provided by the present invention.

In this embodiment, the TTI bundling subframe is divided into two non-contiguous groups, including the first group and the second group, and the HARQ process IDs of the two groups are different. The first group includes consecutive subframes, and the second group includes κ ₂ consecutive subframes. The two groups are non-contiguous with a certain interval in time. As shown in FIG. 5, in this embodiment, only the corpse ₂ = 4, the first group and the second group are separated by 4 subframes, the HARQ process number of the first group is #0, and the HARQ process number of the second group is # 1 , and the retransmission interval is 16 subframes as an example.

The base station uses the UL grant (ie, the initial transmission grant permission command) to schedule uplink data, and the UE transmits uplink data on the PUSCH. The parameters used for transmitting data (that is, time-frequency resources in one subframe) and modulation codes are carried in the UL grant. In the specific implementation, the two groups can share one UL grant, and all the fields except the RV field and the HARQ process field in the UL grant are shared. The scheduled subframes are the same except for the RV version of the data. That is, the two groups use the same parameters to send uplink data on the same time-frequency resource of different subframes. The two groups can also each use a UL grant so that the two group parameters can be different.

The response message fed back by the base station to correctly receive data includes but is not limited to: a positive response message ACK indicating that the base station correctly receives data, and a negative response message indicating that the base station does not correctly receive data. NACK.

As shown in FIG. 5, the timing relationship of the data transmission method provided by this embodiment is as follows:

Assuming that the base station transmits a UL grant to the UE in subframe n, the UE is the same as the existing LTE Rel-8 protocol, and the UE starts from the 4th subframe after receiving the UL grant, and 4 consecutively in n + 4 to n + 7 In the uplink subframe, the data of the first group of subframes is sent.

If the data of any one of the 4 subframes of the first group is correctly received by the base station, the base station feeds back an ACK to the UE; if the data of the 4 subframes of the first group are not correctly received, the base station feeds back a NACK to the UE. In this embodiment, the base station feeds back the ACK/NACK of the first group of data to the UE in subframe n + 11 (i.e., in the fourth subframe after the UE transmits the last subframe of the first group).

The second group of subframes is after the base station feeds back the ACK/NACK subframe of the first group of data; if the feedback of the first group is ACK, the UE does not send the data of the second group of subframes; The feedback is NACK, and the UE transmits the data of the second group of subframes in 4 consecutive uplink subframes of n + 12 to n + 15. The "N" in the subframe n + 11 shown in Fig. 5 represents NACK, and this embodiment assumes that the feedback of the first group is NACK.

If the data of any one of the 4 subframes of the second group is correctly received by the base station, the base station

The UE feeds back the ACK; if the data of the 4 subframes of the second group are not correctly received, the base station feeds back the NACK to the UE. In this embodiment, the base station feeds back the ACK/NACK of the second group of data to the UE in subframe n + 19 (i.e., in the fourth subframe after the UE transmits the last subframe of the second group).

In this embodiment, the retransmission time interval is 16 subframes, the first group data retransmission time point is in the subframe n + 20, and the base station feeds back the ACK/NACK subframe of the second group data in the first group data retransmission. Before the time. If the feedback of the second group is ACK, the UE does not retransmit the data of the subframe of the first group; if the feedback of the second group is NACK, the UE has 4 consecutive uplink subframes of n + 20 to n + 23 in, Retransmit the data of the first group of subframes. The "N" in the subframe n + 19 shown in FIG. 5 represents NACK, and this embodiment assumes that the feedback of the second group is NACK, and the retransmission time of the first group of data (in the subframe n + 20) comes. When retransmitting the first set of data.

In a specific implementation, after the UE retransmits the first group of data, and the feedback of the first group that receives the retransmission is NACK, when the retransmission time of the second group of data arrives, the second group of data is retransmitted; And so on.

Retransmissions can be either adaptive or non-adaptive. If at the 4 subframes before the retransmission start position, as in the embodiment, the subframe n+16, the UE receives the retransmission scheduling grant command UL grant (in which the NDI field is 0) for indicating the uplink scheduling parameter. Then, the uplink HARQ retransmission of the TTI Bundling is adaptive, and the indicated parameter is used for transmission on the indicated resource band, otherwise it is non-adaptive, and the same uplink resource and the same parameter are used for transmission. . Referring to FIG. 6, another timing relationship diagram of the data transmission method provided by the present invention is shown.

In this embodiment, the TTI bundling subframe is divided into two non-contiguous groups, including the first group and the second group, and the HARQ process IDs of the two groups are different. The first group includes consecutive subframes, and the second group includes K ₂ consecutive subframes. The two groups are non-contiguous with a certain interval in time.

Compared with the embodiment shown in Fig. 5 described above, the difference of this embodiment is only: =4, Κ ₂ = 3. The data transmission method of the embodiment shown in FIG. 6 is the same as the embodiment shown in FIG. 5 above, and details are not described herein.

It should be noted that K o K ₂ can also take other values. Preferably, the first group is bundled by 4 consecutive subframes (i.e., I = 4) and is backward compatible with the prior art. Referring to FIG. 7, another timing relationship diagram of the data transmission method provided by the present invention is shown. In this embodiment, the TTI bundling subframe is divided into two non-contiguous groups, including the first group and the second group, and the HARQ process IDs of the two groups are different. The first group includes consecutive subframes, and the second group includes K ₂ consecutive subframes. The two groups are non-contiguous with a certain interval in time.

Compared with the embodiment shown in FIG. 5 above, the difference of this embodiment is: =4, Κ ₂ =6; and the base station feeds back the ACK/NACK subframe of the second group of data, which is heavy in the first group of data. After the time point.

As shown in FIG. 7, the timing relationship of the data transmission method provided by this embodiment is as follows:

Assuming that the base station sends a UL grant to the UE in the subframe n, the UE sends the first group in the 4 consecutive uplink subframes of n + 4 to n + 7 starting from the 4th subframe after receiving the UL grant. Subframe data.

The second group of subframes is after the base station feeds back the ACK/NACK subframe of the first group of data; if the feedback of the first group is ACK, the UE does not send the data of the second group of subframes; For NACK, the UE transmits data of the second group of subframes in 6 consecutive uplink subframes of n + 12 to n + 17. The "N" in the subframe n + 11 shown in FIG. 7 represents NACK, and this embodiment assumes that the feedback of the first group is NACK. If the data of any one of the 6 subframes of the second group is correctly received by the base station, the base station feeds back an ACK to the UE; if the data of the 6 subframes of the second group are not correctly received, the base station feeds back a NACK to the UE. In this embodiment, the base station feeds back the ACK/NACK of the second group of data to the UE in subframe n + 21 (ie, the fourth subframe after the UE transmits the last subframe of the second group).

In this embodiment, the retransmission time interval is 16 subframes, the first group data retransmission time point is in the subframe n + 20, and the base station feeds back the ACK/NACK subframe of the second group data in the first group data retransmission. After the time. When the first group of data retransmission time points arrives, the UE retransmits the data of the first group of subframes starting from the subframe n + 20. In the process of retransmitting the data of the first group of subframes, if the UE receives the feedback of the second group as the ACK in the subframe n + 21, the UE stops retransmitting the first group of children from the subframe n+22. The data of the frame; if the UE receives the feedback of the second group as the NACK in the subframe n + 21, the UE continues to retransmit the data of the subframe of the first group. The "A" in the subframe n+21 shown in FIG. 7 indicates the ACK. In this embodiment, it is assumed that the UE receives the feedback of the second group as the ACK in the subframe n + 21, and stops the retransmission from the subframe n+22. The data of the first group of sub-frames.

Retransmissions can be either adaptive or non-adaptive. If at the 4 subframes before the retransmission start position, as in the embodiment, the subframe n+16, the UE receives the retransmission scheduling grant command UL grant (in which the NDI field is 0) for indicating the uplink scheduling parameter. Then, the uplink HARQ retransmission of the TTI Bundling is adaptive, and the indicated parameter is used for transmission on the indicated resource band, otherwise it is non-adaptive, and the same uplink resource and the same parameter are used for transmission. . The data transmission method provided by the embodiment of the present invention divides the TTI bundling subframe into at least two non-contiguous groups, and the user equipment sends different redundancy versions of the same data in multiple groups of subframes, which can avoid consecutive subframes. The deep fading on the ground leads to the failure to meet the channel quality goal, while obtaining a certain time Diversity gain, which enhances upstream coverage in communications. Moreover, the base station performs ACK/NACK feedback on the two groups separately, avoiding waste of resources caused by unnecessary repeated data transmission, and improving resource utilization. The embodiment of the present invention further provides a base station and a user equipment, which can implement the data transmission method in the foregoing embodiment, and enhance uplink coverage of the LTE.

FIG. 8 is a schematic structural diagram of an embodiment of a base station provided by the present invention.

The base station provided in this embodiment includes:

The first transmission scheduling sending module 11 is configured to send an initial transmission scheduling permission command to the user equipment, instructing the user equipment to send the same data in multiple subframes and a scheduling parameter indicating the same data; the multiple subframes are divided into M a non-contiguous group, which is a first group to an Mth group, respectively, M > 2, and each of the groups includes one subframe or a plurality of consecutive subframes;

The data processing module 12 is configured to receive the same data sent by the user equipment in the multiple subframes, and feed back, to the user equipment, a response message that correctly receives the same data, where the user equipment is in a sub-group of each group. The same data transmitted in a frame or a plurality of consecutive subframes corresponds to each set of data.

Wherein the first group includes consecutive sub-frames, the second group comprising K ₂ consecutive sub-frames, ..., the first K0 _[mu] [mu] group comprises consecutive subframes. The total number of subframes in the M non-contiguous groups is greater than four, that is, four.

Optionally, in the plurality of subframes, a redundancy version of the same data sent on every two adjacent subframes This is different. If the number of subframes in the Xth group is K _x >4, the redundancy version used in the previous subframe can be reused or the existing 4 redundancy versions (ie, RV0, RV1, RV2, RV3) can be extended to More, of which, 1 XM.

As shown in FIG. 9, the data processing module 12 specifically includes:

The data receiving unit 121 is configured to receive the Xth group of data that is sent by the user equipment in one subframe or multiple consecutive subframes of the Xth group;

The response feedback processing unit 122 is configured to: if the data sent by the user equipment in any subframe of the Xth group is correctly received, feed back to the user equipment an acknowledgement message that correctly receives the Xth group of data; if not received correctly The data sent by the user equipment in all the one or more consecutive subframes of the Xth group feeds back to the user equipment a negative acknowledgement message that does not correctly receive the Xth group of data; wherein, 1 XM.

Specifically, the time for feeding back to the user equipment whether the response message of the Xth group of data is correctly received is the kth subframe after the last subframe in the Xth group; wherein, 1 XM, k > 4 „ For FDD (Frequency Division Duplexing) mode, k=4; for TDD (Time Division Duplexing) mode, k=4, 5, 6, or 7.

In an embodiment, as shown in FIG. 9, the data processing module 12 further includes:

The retransmission data receiving unit 123 is configured to receive the Xth group of data retransmitted by the user equipment when the Xth group data retransmission time comes.

In addition, as shown in FIG. 8, the base station provided in this embodiment further includes:

The retransmission scheduling sending module 13 is configured to: before the retransmission time of the Xth group of data arrives, to the The user equipment sends a retransmission scheduling permission command, indicating a scheduling parameter update of the retransmission of the Xth group of data, that is, adaptive retransmission. Referring to FIG. 10, it is a schematic structural diagram of an embodiment of a user equipment provided by the present invention.

The user equipment provided in this embodiment includes:

The initial transmission scheduling receiving module 21 is configured to receive an initial transmission scheduling permission command of the base station, where the initial transmission scheduling permission command is used to indicate that the user equipment sends the same data in multiple subframes and the scheduling parameter that indicates the same data. The plurality of subframes are divided into M non-contiguous groups, which are in order from the first group to the Mth group, M>2, and each of the groups includes one subframe or multiple consecutive subframes;

The data transceiver module 22 is configured to send the same data in the multiple subframes, and receive a response message that is received by the base station to correctly receive the same data, where the user equipment is in one subframe or multiple consecutive subgroups of each group. The same data sent in the frame corresponds to each set of data.

Optionally, in the multiple subframes, a redundancy version of the same data sent on every two adjacent subframes is different. If the number of subframes in the Xth group is K _x >4, the redundancy version used in the previous subframe can be reused or the existing 4 redundancy versions (ie, RV0, RV1, RV2, RV3) can be extended to More, of which, 1 XM. As shown in FIG. 11, the data transceiver module 22 specifically includes:

a data sending unit 221, configured to send the Yth group data in one subframe or multiple consecutive subframes of the Yth group;

The response receiving processing unit 222 is configured to receive a response message that is correctly received by the base station to receive the Yth group of data. If the acknowledgement message of the Yth group correctly received by the base station is received, the one of the remaining groups is not received. Transmitting data in a subframe or a plurality of consecutive subframes; if receiving a negative acknowledgement message fed back by the base station that does not correctly receive the Yth group of data, continuing one subframe or a plurality of consecutive subframes in the Y+1th group Send the Y+1th group of data; where, 1 Y M-1.

In an embodiment, as shown in FIG. 11, the data transceiver module 22 further includes:

The first data retransmission unit 223 is configured to: if the acknowledgement message that correctly receives any set of data fed back by the base station is received before the Xth data retransmission time arrives, the Xth group data is not retransmitted; Before the arrival of the X-th data retransmission time, the acknowledgement message that correctly receives any set of data fed back by the base station is not received, and the X-th data is retransmitted when the X-th data retransmission time arrives; , 1 XM;

The second data retransmission unit 224 is configured to: when retransmitting the Xth group of data, if receiving an acknowledgement message that is correctly received by the base station and correctly receiving any group of data, stop retransmitting the Xth group of data; If the acknowledgement message fed back by the base station to correctly receive any set of data is not received, the X-th group of data is continuously retransmitted.

In addition, as shown in FIG. 11, the user equipment provided in this embodiment further includes: a retransmission scheduling receiving module 23, configured to receive the weight of the base station before the retransmission time of the Xth group of data arrives And transmitting a scheduling permission command; the retransmission scheduling permission command is used to indicate a scheduling parameter update of the retransmission of the Xth group of data, that is, adaptive retransmission. The user equipment and the base station provided by the embodiment of the present invention divide the subframe in which ΤΉ bundling is performed into at least two non-contiguous groups, and the user equipment sends different redundancy versions of the same data in subframes of multiple groups, which can avoid continuous The deep fading on the sub-frame leads to the failure to achieve the channel quality target, and at the same time, a certain time diversity gain is obtained, which can enhance the uplink coverage in the communication. Moreover, the base station performs ACK/NACK feedback on the two groups separately, avoiding waste of resources caused by unnecessary repeated data transmission, and improving resource utilization. A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, the program When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is a preferred embodiment of the present invention, it should be noted that the ordinary technology in the art Many modifications and refinements can be made by the skilled artisan without departing from the principles of the invention, and such modifications and refinements are also considered to be within the scope of the invention.

Claims

Rights request

A data transmission method, comprising:

Sending an initial transmission permission permission command to the user equipment, instructing the user equipment to send the same data in multiple subframes and scheduling parameters indicating the same data; the multiple subframes are divided into M non-contiguous groups, in order a group to the Mth group, M > 2, wherein each group includes one subframe or a plurality of consecutive subframes;

The data transmission method according to claim 1, wherein the receiving the same data sent by the user equipment in the plurality of subframes, and feeding back to the user equipment whether the response of the same data is correctly received The message, including:

3. The data transmission method according to claim 2, further comprising: receiving the Xth group of data retransmitted by the user equipment when the Xth data retransmission time comes.

The data transmission method according to any one of claims 1 to 3, wherein the time of returning the response message of the Xth group data to the user equipment is the last child in the Xth group. The kth subframe after the frame; where, 1 XM, k > 4„

The data transmission method according to claim 3, wherein the retransmission time of the Xth group of data is the mth subframe after the first subframe in the Xth group; wherein m>8.

The data transmission method according to claim 5, further comprising: before the retransmission time of the Xth data arrives, further comprising:

And transmitting, by the user equipment, a retransmission scheduling permission command, indicating that the scheduling parameter of the retransmission of the Xth group of data is updated.

The data transmission method according to any one of claims 1 to 6, wherein the total number of subframes in the M non-contiguous groups is greater than four;

Each set of data corresponds to each hybrid automatic request retransmission process number; each hybrid automatic request retransmission process number is used to identify that during the initial transmission or retransmission of data, scheduling and feedback are directed to each of the sets of data. .

The data transmission method according to any one of claims 1 to 7, wherein the transmitting the initial transmission permission permission command to the user equipment comprises:

Sending a preliminary transmission permission command to the user equipment, indicating that the user equipment is in the M non-connected Scheduling parameters of the same data sent in multiple subframes of the group; or

The data transmission method according to any one of claims 1 to 8, characterized in that, in the plurality of subframes, a redundancy version of the same data transmitted on every two adjacent subframes is different.

10. A data transmission method, comprising:

The data transmission method according to claim 10, wherein the transmitting the same data in the plurality of subframes and receiving a response message that is correctly received by the base station to receive the same data includes:

Receiving, by the base station, a response message that correctly receives the Yth group of data; If the acknowledgement message that correctly receives the Yth group data fed back by the base station is received, the data is not sent in one subframe or multiple consecutive subframes of the remaining group;

If the negative acknowledgement message that is not correctly received by the base station and does not correctly receive the Yth group of data is received, then the Y+1th group of data is continuously sent in one subframe or multiple consecutive subframes of the Y+1th group;

Among them, 1 Y M-1.

The data transmission method according to claim 11, further comprising: receiving an acknowledgement message correctly received by the base station to correctly receive any set of data before the X-th data retransmission time arrives, The X group data is not retransmitted;

The data transmission method according to claim 12, wherein the method further comprises: in the process of retransmitting the Xth group of data, if the base station receives an affirmation of correctly receiving any set of data fed back by the base station In response to the message, the retransmission of the Xth group of data is stopped; if the acknowledgement message of the correct reception of any set of data fed back by the base station is not received, the Xth group of data is continuously retransmitted.

The data transmission method according to any one of claims 10 to 13, wherein the base station returns whether the time of receiving the response message of the Xth group of data is correctly, which is after the last subframe in the Xth group. The kth subframe; where, 1 XM, k > 4„

The data transmission method according to claim 12 or 13, wherein the retransmission time of the Xth group of data is the mth subframe after the first subframe in the Xth group; wherein m > 8.

The data transmission method according to claim 12 or 13, wherein before the retransmission time of the Xth data arrives, the method further includes:

Receiving a retransmission scheduling permission command of the base station; the retransmission scheduling permission command is used to indicate scheduling parameter update of retransmission of the Xth group data.

The data transmission method according to any one of claims 10 to 16, wherein the total number of subframes in the M non-contiguous groups is greater than four;

The data transmission method according to any one of claims 10 to 17, wherein the initial transmission permission command of the receiving base station comprises:

Receiving a first transmission scheduling permission command of the base station; the initial transmission scheduling permission command instructing a scheduling parameter of the same data sent by the user equipment in multiple subframes of the M non-contiguous groups; or

Receiving M initial transmission scheduling permission commands of the base station; each initial transmission scheduling permission command corresponds to one subframe or a plurality of consecutive subframes of the group, and is used to indicate that the user equipment is in one subframe of the group or Each set of scheduling parameters of the same data transmitted in multiple consecutive subframes.

The data transmission method according to any one of claims 10 to 18, wherein, in the plurality of subframes, a redundancy version of the same data transmitted on every two adjacent subframes is different.

20. A base station, comprising:

a data processing module, configured to receive the same data sent by the user equipment in the multiple subframes, and feed back, to the user equipment, a response message that correctly receives the same data, where the user equipment is in one subframe of each group The same data transmitted in one or more consecutive subframes corresponds to each set of data.

The base station according to claim 20, wherein the data processing module comprises: a data receiving unit, configured to receive the user equipment in one subframe or multiple consecutive subframes of the Xth group The Xth group of data sent;

The response feedback processing unit is configured to: if the data sent by the user equipment in any subframe of the Xth group is correctly received, feed back, to the user equipment, an acknowledgement message that correctly receives the Xth group of data; if the user is not correctly received And transmitting, by the device, the data sent by all the one subframes or the multiple consecutive subframes of the Xth group, and feeding back, to the user equipment, a negative acknowledgement message that does not correctly receive the Xth group of data;

Among them, 1 XM.

The base station according to claim 21, wherein the data processing module further comprises: a retransmission data receiving unit, configured to receive the retransmission of the user equipment when the Xth data retransmission time arrives Group X data.

The base station according to any one of claims 20 to 22, wherein the time when the response message of the Xth group of data is correctly received is fed back to the user equipment, which is after the last subframe in the Xth group. The kth subframe; where, 1 XM, k > 4„

The base station according to claim 22, wherein the retransmission time of the Xth group of data is the mth subframe after the first subframe in the Xth group; wherein m>8.

The base station according to claim 22, wherein the base station further comprises: a retransmission scheduling sending module, configured to send a retransmission schedule to the user equipment before a retransmission time of the Xth group of data arrives A permission command that updates the scheduling parameters of the retransmission of the Xth group of data.

The base station according to any one of claims 20 to 25, wherein the total number of subframes in the M non-contiguous groups is greater than four;

The base station according to any one of claims 20 to 26, wherein the initial transmission is scheduled to be sent The sending module sends a preliminary transmission permission command to the user equipment, indicating a scheduling parameter of the same data sent by the user equipment in multiple subframes of the M non-contiguous groups; or

The base station according to any one of claims 20 to 27, wherein in the plurality of subframes, a redundancy version of the same data transmitted on every two adjacent subframes is different.

29. A user equipment, comprising:

An initial transmission scheduling receiving module, configured to receive an initial transmission scheduling permission command of the base station, where the initial transmission scheduling permission command is used to indicate that the user equipment sends the same data in multiple subframes and the scheduling parameter indicating the same data; The sub-frames are divided into M non-contiguous groups, which are in order from the first group to the M-th group.

M > 2, each of the groups includes one subframe or a plurality of consecutive subframes;

The user equipment according to claim 29, wherein the data transceiver module comprises:

a data sending unit, configured to send the Yth group data in one subframe or a plurality of consecutive subframes of the Yth group; a response receiving processing unit, configured to receive a response message that is correctly received by the base station to receive the Yth group of data; if an acknowledgement message that correctly receives the Yth group of data fed back by the base station is received, the one of the remaining groups is not Transmitting data in a frame or a plurality of consecutive subframes; if receiving a negative acknowledgement message fed back by the base station that does not correctly receive the Yth group of data, continuing in one subframe or a plurality of consecutive subframes of the Y+1th group Send the Y+1th group data; where, 1 Y M-1.

The user equipment of claim 30, wherein the data transceiver module further comprises:

a first data retransmission unit, configured to: if an acknowledgement message that correctly receives any set of data fed back by the base station is received before the Xth data retransmission time arrives, the Xth group data is not retransmitted; Before the X-th data retransmission time arrives, the acknowledgement message that correctly receives any set of data fed back by the base station is not received, and the X-th data is retransmitted when the X-th data retransmission time arrives; 1 XM.

The user equipment of claim 31, wherein the data transceiver module further comprises:

a second data retransmission unit, configured to: in the process of retransmitting the Xth group of data, if receiving an acknowledgement message that is correctly received by the base station and correctly receiving any set of data, stopping retransmitting the Xth group of data; Upon receiving the acknowledgement message fed back by the base station to correctly receive any set of data, the X-group data is continuously retransmitted.

The user equipment according to any one of claims 29 to 32, wherein the base station is reversed The time at which the response message of the Xth group data is correctly received is the kth subframe after the last subframe in the Xth group; where, 1 XM, k > 4.

The user equipment according to claim 31 or 32, wherein the retransmission time of the Xth group of data is the mth subframe after the first subframe in the Xth group; wherein, m > 8 .

The user equipment according to claim 31 or 32, wherein the user equipment further comprises:

a retransmission scheduling receiving module, configured to receive a retransmission scheduling permission command of the base station before a retransmission time of the Xth group of data arrives; the retransmission scheduling permission command is used to indicate a retransmission scheduling of the Xth group of data Parameter update.

The user equipment according to any one of claims 29 to 35, wherein the total number of subframes in the first group to the Mth group is greater than four;

Each set of data has a different hybrid automatic request retransmission process number; the hybrid automatic request retransmission process number is used to identify that the scheduling and feedback are for the same set of data during data initial transmission or retransmission.

The user equipment according to any one of claims 29 to 36, wherein the initial transmission scheduling receiving module receives an initial transmission scheduling permission command of the base station; and the initial transmission scheduling permission command indicates that the user equipment is Scheduling parameters of the same data transmitted in multiple subframes of M non-contiguous groups; or

The user equipment according to any one of claims 29 to 37, wherein, in the plurality of subframes, a redundancy version of the same data transmitted on every two adjacent subframes is different.